Arc Warden has default attack animations and injured attack animations. The latter is supposed to play when attacking while below a certain hp%.

Arc Warden also has different speeds of animations of his regular attacks, normal, fast, faster and fastest. So his attack animation adapts with attack speed to look smoother.

However, here lies the issue: He does not have different speeds for his injured attack animations. So when injured and having regular attack speed, the injured attack animations are used as expected. But when having higher attack speed, he uses the regular attack animations, because there are no fast injured animations.

This should be easy to fix, it just needs copy-pasting the already existing injured attack animations and change their fps like how the regular fast attack speed animations are.